JP2015182697A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform air conditioning in a vehicle compartment more properly.SOLUTION: A control device 2 for a vehicle air conditioner 1 is provided which switches air conditioning inside a vehicle compartment 90 from all-seat mode to a driver-seat mode when a predetermined condition for a case where an occupant seats on only a driver seat, is satisfied. The control device 2 includes air conditioning control means 32 which controls air conditioning air to be supplied to the inside of a vehicle compartment 90. The air conditioning control means 32 comprises: a necessary heat amount calculation part 33 for calculating a necessary air conditioning heat amount Qr which is required for air conditioning of the inside of the vehicle compartment 90; an air conditioning control part 37 for controlling the air conditioning air based on the necessary air conditioning heat amount Qr; a load heat amount calculation part 34 for calculating a load heat amount QL of a space not included in a space surrounding the driver seat inside the vehicle compartment 90, when the air conditioning mode is switched from the all-seat mode to the driver-seat mode; and a correction amount determination part 35 for calculating a correction amount D of the necessary air conditioning heat amount Qr calculated by the necessary heat amount calculation part 33, based on a total load heat amount QL_all which is calculated during the driver-seat mode, when the air conditioning mode is switched to the all-seat mode from the driver-seat mode.

Description

  The present invention relates to a vehicle air conditioner.

In the vehicle air conditioner, the temperature and air volume of the conditioned air supplied to the vehicle interior are adjusted based on the temperature in the vehicle interior detected by the temperature sensor and the set temperature of the air conditioning.
Here, since the number of temperature sensors that can be installed in the passenger compartment is limited, in the conventional vehicle air conditioner, a temperature sensor is provided around the driver's seat where an occupant always sits when the vehicle is traveling. The temperature is detected.

  In Patent Document 1, when a passenger is seated only in the driver's seat, the air conditioning in the passenger compartment is changed from a mode (all seat mode) that targets all seats in the passenger compartment to a mode that targets only around the driver's seat ( A vehicle air conditioner that is switched to the driver seat mode) is disclosed.

Japanese Patent No. 3405004

  However, if air conditioning in the passenger compartment is performed in the driver's seat mode, only the driver's seat area is air-conditioned in the driver's seat mode, and the other seats are not air-conditioned, so the temperature around the driver's seat and the temperature around the other seats There will be a gap between the two.

For this reason, in the case of a vehicle air conditioner that detects the temperature in the passenger compartment only with the temperature sensor provided around the driver's seat, if the air conditioning mode returns from the driver's seat mode to the all-seat mode due to the seating of passengers in other seats, Immediately after that, the temperature in the passenger compartment detected by the temperature sensor does not reflect the temperature around the other seats.
If the temperature and air volume of the conditioned air are determined based on the temperature in the passenger compartment that does not reflect the temperature around the other seats, the air conditioning around the other seats becomes insufficient.

  Here, in order to reflect the temperature around the other seats in the determination of the temperature and air volume of the conditioned air, it is necessary to increase the number of temperature sensors provided in the passenger compartment. Only the cost of the vehicle air conditioner will increase.

  Therefore, in a vehicle air conditioner that adjusts the temperature and air volume of conditioned air supplied to the passenger compartment based on the temperature around the driver's seat, the air conditioner in the passenger compartment is switched from the driver seat mode to the all seat mode. There is a demand for more appropriate air conditioning.

The present invention
A first air-conditioning mode for air-conditioning the entire space in the vehicle interior and a second air-conditioning mode for air-conditioning a specific space in the vehicle interior are prepared as air-conditioning modes for the vehicle interior,
A vehicle configured to switch the air conditioning mode in the passenger compartment from the first air conditioning mode to the second air conditioning mode when a predetermined condition is satisfied when an occupant is seated only in the specific space. Air conditioner control device,
Air conditioning mode determining means for determining the air conditioning mode;
Air conditioning control means for controlling the conditioned air supplied into the vehicle compartment,
The air conditioning control means includes
A required heat amount calculation unit for calculating a heat amount necessary for air conditioning in the vehicle interior based on at least the temperature of the specific space detected by the temperature sensor and the set temperature of the air conditioning;
An air conditioning control unit for controlling the temperature and the air volume of the conditioned air supplied into the vehicle interior based on the amount of heat;
When the air conditioning mode is switched from the first air conditioning mode to the second air conditioning mode, a load heat amount calculating unit that calculates a load heat amount in a space not included in the specific space in the vehicle interior;
When the air-conditioning mode is switched from the second air-conditioning mode to the first air-conditioning mode, the necessary heat amount calculation unit calculates based on the load heat amount calculated during the second air-conditioning mode. A correction amount determination unit that determines a correction amount of the heat amount,
When the correction amount is determined, the air-conditioning control unit controls the temperature and the air volume of the conditioned air based on the heat amount corrected by the correction amount. .

With this configuration, when switching from the second air conditioning mode to the first air conditioning mode, the space that was not subject to air conditioning in the second air conditioning mode (the space in the vehicle interior not included in the specific space) The amount of heat calculated by the necessary heat amount calculation unit is corrected based on the load heat amount.
Here, since the load heat amount calculated during the second air conditioning mode is the heat amount that contributed to the temperature change during the second air conditioning mode of the space that was not subject to air conditioning, the corrected heat amount. Is the amount of heat (load heat amount) that contributes to the temperature change of the space that was not subject to air conditioning.
Therefore, if the air conditioning of the vehicle interior after switching from the second air conditioning mode to the first air conditioning mode is performed based on the corrected heat quantity, the vehicle interior is more appropriately than when air conditioning is performed without correcting the heat quantity. Can be air-conditioned.

It is a schematic block diagram of the vehicle carrying the vehicle air conditioner concerning an embodiment. It is a functional block diagram of the control apparatus of the vehicle air conditioner concerning an embodiment. It is a flowchart of the process which the air-conditioning mode determination means of a control apparatus implements. It is a flowchart of the process which the air-conditioning control means of a control apparatus implements. It is a time chart explaining the change of required air-conditioning calorie | heat amount and load calorie | heat amount.

Embodiments of the present invention will be described below.
FIG. 1 is a diagram illustrating a schematic configuration of a vehicle V equipped with a vehicle air conditioner 1 according to an embodiment. FIG. 1A is a plan view of a vehicle V on which the vehicle air conditioner 1 is mounted, and the range of space to be air-conditioned when the air conditioner mode of the vehicle air conditioner 1 is the all-seat mode, and driving It is a figure explaining the range of the space air-conditioned when it is a seat mode. FIG. 1B is a diagram schematically illustrating a cross section of the vehicle V on which the vehicle air conditioner 1 is mounted, and is a diagram schematically illustrating the configuration of the vehicle air conditioner 1.

  The vehicle air conditioner 1 adjusts conditioned air supplied to the passenger compartment 90 (temperature-adjusted air), and is cooled by an evaporator 12 that cools air blown from the blower 11, and the evaporator 12. The mixing door 14 that adjusts the amount of air flowing into the heater core 13 side and the heater core 13 that warms the air flowing in from the evaporator 12 side are provided.

  In the vehicle air conditioner 1, the air cooled by the evaporator 12 and the air warmed via the heater core 13 are mixed in the mixing unit 15 to adjust the conditioned air at a predetermined temperature. The temperature of the conditioned air is adjusted by adjusting the amount of the cooled air flowing into the heater core 13 by the mix door 14.

  The conditioned air whose temperature has been adjusted in the mixing unit 15 passes through the supply ports (the differential side supply port 16, the front side supply port 17, and the vent side supply port 18) that open to the mixing unit 15, and enters the vehicle interior 90. It comes to be supplied.

  For example, as shown in FIG. 1A, the front side supply port 17 is supplied with driver seat side ducts 19a and 19b for supplying conditioned air to the driver seat DS side and conditioned air to the front passenger seat PS side. Passenger seat side ducts 19c and 19d are connected, and doors 20 (20a to 20d) driven by a duct door drive motor 56 (see FIG. 2) are attached to the ducts 19a to 19d.

  In the vehicle air conditioner 1 according to the embodiment, an all-seat mode that targets air conditioning in the entire space in the passenger compartment 90 and a driver seat mode that targets air conditioning only around the driver seat DS in the passenger compartment 90 It is prepared as an air conditioning mode in the room 90, and switching between the all seat mode and the driver seat mode is controlled by the control device 2 (see FIG. 2) of the vehicle air conditioner 1.

FIG. 2 is a functional block diagram of the control device 2 of the vehicle air conditioner 1.
As shown in FIG. 2, the control device 2 of the vehicle air conditioner 1 includes a CPU 30, a storage unit 40, and an input / output port (I / O) 21, which are connected via a bus 22. Are connected to each other.
A seating sensor 51, a temperature sensor 52, an outside air temperature sensor 53, and a solar radiation amount sensor 54 are connected to the input / output port 21 of the control device 2.

  The seating sensor 51 is provided in each seat (driver's seat DS, passenger seat PS, rear seat RS) in the passenger compartment 90, and each seating sensor 51 is the presence or absence of a passenger in the seat where the seating sensor 51 is provided. Is output to the control device 2.

The temperature sensor 52 is a sensor that detects the temperature around the driver seat DS, and outputs a signal indicating the detected temperature around the driver seat DS to the control device 2.
In the embodiment, the temperature sensor 52 is attached to the stearin column cover 91 (see FIG. 1B).

The outside air temperature sensor 53 is a sensor that detects the temperature outside the passenger compartment 90 and outputs a signal indicating the detected temperature outside the passenger compartment 90 to the control device 2.
The solar radiation amount sensor 54 is a sensor that detects the solar radiation amount into the passenger compartment 90 and outputs a signal indicating the detected solar radiation amount to the control device 2.

  Further, a mix door drive motor 55, a duct door drive motor 56, and air conditioning setting means 57 are connected to the input / output port 21 of the control device 2.

The mix door drive motor 55 is an actuator that rotates the mix door 14 of the vehicle air conditioner 1. The mix door drive motor 55 is based on a drive signal input from the control device 2 via the input / output port 21. Then, the mix door 14 is rotated.
Therefore, in the vehicle air conditioner 1, the amount of air flowing into the heater core 13 can be adjusted according to the angular position around the rotation axis of the mix door 14.

The duct door drive motor 56 is an actuator that rotates the door 20 of the supply port (the differential side supply port 16, the front side supply port 17, the vent side supply port 18) that opens to the mixing unit 15 of the vehicle air conditioner 1. A dedicated duct door drive motor 56 is provided for each door 20.
The duct door drive motor 56 also rotates the door 20 based on a drive signal input from the control device 2 via the input / output port 21. In the vehicle air conditioner 1, the door 20 The amount of conditioned air flowing into the passenger compartment 90 through the supply ports (the differential side supply port 16, the front side supply port 17, the vent side supply port 18) is controlled.

For example, in the case of the front side supply port 17, the front side supply port 17 has driver seat side ducts 19a and 19b for supplying conditioned air to the driver seat DS side, and a passenger seat side for supplying conditioned air to the passenger seat PS side. Ducts 19c and 19d are connected.
Therefore, the duct door drive motor 56 rotates the doors 20a to 20d attached to the ducts 19a to 19d to open and close the openings on the mixing unit 15 side of the ducts 19a to 19d.
FIG. 1A shows the positions of the doors 20a to 20d when the air conditioning mode is the driver's seat mode, and the conditioned air adjusted by the vehicle air conditioner 1 is converted into the driver's seat side duct 19a. , 19b is shown.

The air conditioning setting means 57 is an interface for inputting an instruction to the vehicle air conditioner 1. For example, an instruction input of an operation mode (automatic or manual) of the vehicle air conditioner 1 or an air conditioning set temperature in the passenger compartment 90 is set. It is operated by the occupant when inputting instructions.
Therefore, in the passenger compartment 90, the air conditioning setting means 57 is provided at a position where an occupant seated in the driver seat DS or the passenger seat PS can operate.

  The storage unit 40 is composed of an information recording medium such as a ROM or a memory, for example, and stores a control program for each process executed by the CPU 30.

  The CPU 30 includes an air conditioning mode determining unit 31 that determines an air conditioning mode (air conditioning mode), and an air conditioning control unit 32 that controls the conditioned air supplied to the vehicle interior in accordance with the determined air conditioning mode. .

As described above, in the embodiment, as the air conditioning mode in the passenger compartment 90, the all seat mode in which the entire space in the passenger compartment 90 is subject to air conditioning, and the space around the driver seat DS in the passenger compartment 90 is subject to air conditioning. A driver's seat mode is provided.
In the embodiment, the air conditioning mode determining means 31 determines the air conditioning in the driver seat mode only when a predetermined condition is satisfied when the occupant is seated only in the driver seat DS, and normally the air conditioning in the all seat mode. Is to decide.

Whether the occupant is seated only in the driver's seat DS is specified by an output signal of the seating sensor 51 provided in each seat (driver's seat DS, front passenger seat PS, rear seat RS).
The predetermined condition is satisfied when the difference ΔT (absolute value) between the temperature Tc around the driver's seat DS detected by the temperature sensor 52 and the current air conditioning set temperature Tset is less than a predetermined threshold temperature T_th. (T_th> ΔT (= | Tset−Tc |).

Here, during air conditioning in the all-seat mode, if the difference between the set temperature Tset and the temperature Tc detected by the temperature sensor 52 is less than the threshold temperature T_th, the temperature of the entire space in the passenger compartment 90 is substantially equal to the set temperature Tset. By adjusting to the same temperature, the temperature in the passenger compartment 90 is stable.
In the embodiment, the air-conditioning mode determining means 31 determines to change to the driver seat mode when the passenger is seated only in the driver seat DS and the temperature in the passenger compartment 90 is stable. It is supposed to be.

  The air-conditioning mode determining means 31 detects that a passenger is seated in a seat other than the driver seat DS (passenger seat PS, rear seat RS) while controlling the air-conditioning of the passenger compartment in the driver seat mode. In this case, the air conditioning mode in the passenger compartment 90 is switched from the driver seat mode to the all seat mode.

  The air conditioning control means 32 controls the conditioned air supplied into the passenger compartment 90, and includes a necessary heat amount calculation unit 33, a load heat amount calculation unit 34, a correction amount determination unit 35, an air conditioning condition determination unit 36, An air conditioning control unit 37.

The necessary heat amount calculation unit 33 calculates the amount of heat necessary for air conditioning in the passenger compartment 90 (necessary air conditioning heat amount Qr).
The required air conditioning calorie Qr is the amount of heat necessary for stabilizing the temperature in the passenger compartment 90 (necessary stable heat amount Qs), the amount of heat required for changing the temperature in the passenger compartment 90 (necessary change heat amount Qv), (Qr = Qs + Qv).

Here, the necessary stable heat quantity Qs is a heat quantity necessary for canceling the heat quantity that acts on the inside of the passenger compartment 90 from outside the passenger compartment 90 and changes the temperature inside the passenger compartment 90, and is the outside air temperature Tamb and the amount of solar radiation. The amount of heat that depends on Qsun.
The necessary change heat amount Qv is the amount of heat necessary to change the temperature in the passenger compartment 90 to the preset temperature of the air conditioning, and the air conditioning preset temperature Tset, the actual temperature Tc in the passenger compartment 90, and the passenger compartment. The amount of heat depends on the amount of heat required to raise the temperature of the air in 90 by 1 ° C.
Therefore, when the actual temperature Tc in the passenger compartment 90 becomes the set temperature Tset for air conditioning, it is not necessary to change the temperature in the passenger compartment 90, so the necessary change heat quantity Qv becomes 0 (zero).

  In the embodiment, the necessary heat amount calculation unit 33 calculates the necessary stable heat amount Qs based on the outside air temperature Tamb and the solar radiation amount Qsun, and also based on the set temperature Tset of the air conditioning and the actual temperature Tc in the passenger compartment 90. Then, the required change heat quantity Qv is calculated, and the calculated required stable heat quantity Qs and the required change heat quantity Qv are added together to calculate the required air conditioning heat quantity Qr.

  When the air conditioning mode in the passenger compartment 90 is switched from the all-seat mode to the driver's seat mode, the load calorie calculation unit 34 acts on a space that is not subject to air conditioning in the driver's seat mode (a space excluding the driver's seat DS). The load heat quantity QL to be calculated is calculated.

This load calorie | heat amount QL is computed from following formula (1).
QL = (A × (Tamb−Tset) / t) + B × Qsun + C (1)
Here, A, B, and C are coefficients set in advance, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

  Note that the load heat quantity QL is a heat quantity that acts on a space that is not subject to air conditioning in the driver's seat mode and changes the temperature of the space that is not subject to air conditioning. While in the seat mode, it is repeatedly calculated at every processing execution interval.

Here, an area (storage area 40a) for storing the integrated value of the load heat quantity QL (total load heat quantity QL_all) is secured in the storage section 40, and the load heat quantity calculation section 34 calculates the load heat quantity QL. Every time, the calculated load heat quantity QL is added to the value stored in the storage area 40a of the storage unit 40.
Therefore, by referring to the storage area 40a of the load heat quantity QL, the integrated value (total load heat quantity QL_all) of the load heat quantity QL calculated up to that point can be known.

  When the air conditioning mode returns from the driver seat mode to the all seat mode, the correction amount determining unit 35 corrects the required air conditioning heat amount Qr calculated by the required heat amount calculating unit 33 based on the total load heat amount QL_all during the driver seat mode. And the required air conditioning heat amount Qr is corrected with the determined correction amount D.

This correction amount D is calculated from the following equation (2).
D = E × (Tamb−Tset) + F × Qsun + G (2)
Here, E, F, and G are preset coefficients, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

  The correction amount D is a heat amount calculated in consideration of the difference between the outside air temperature Tamb and the air conditioning set temperature Tset and the solar radiation amount Qsun when the correction amount D is calculated. The larger the difference from the set temperature Tset or the solar radiation amount Qsun, the larger the value is set.

The air conditioning condition determining unit 36 is configured to adjust the target temperature Ta of the conditioned air to be adjusted by the vehicle air conditioner 1 based on the required air conditioning heat amount Qr calculated by the required heat amount calculating unit 33, and the vehicle interior 90 from the vehicle air conditioner 1. The target air volume Af of the conditioned air to be supplied to is determined.
Further, when the correction amount D is determined by the correction amount determination unit 35, the heat amount obtained by adding the correction amount D to the required air conditioning heat amount Qr calculated by the required heat amount calculation unit 33 is used as the corrected necessary air conditioning heat amount. Qr ′ (Qr ′ = Qr + D) is set, and the target temperature Ta and target air volume Af of the conditioned air are determined based on the corrected required air conditioning heat quantity Qr ′.

The air conditioning control unit 37 generates and generates a drive signal for the mix door drive motor 55 and a drive signal for the blower 11 in order to realize the target temperature Ta and the target air volume Af determined by the air conditioning condition determination unit 36. The drive signal is output to the mix door drive motor 55 and the blower 11 via the input / output port 21.
Thereby, while the air volume of the blower 11 is controlled to become the target air volume Af, the air passing through the heater core 13 and the air directly flowing into the mixing unit 15 from the evaporator 12 are mixed in the mixing unit 15. The position of the mix door 14 is controlled so as to be conditioned air having the target temperature Ta by mixing.

  The functional blocks of the air conditioning mode determining means 31 and the necessary heat amount calculating unit 33, the load heat amount calculating unit 34, the correction amount determining unit 35, the air conditioning condition determining unit 36, and the air conditioning control unit 37 of the air conditioning control unit 32 are as follows. This is realized by the CPU 30 included in the control device 2 executing a program stored in the storage unit 40.

Hereinafter, processing performed by the control device 2 will be described.
FIG. 3 is a flowchart illustrating a process performed by the air conditioning mode determining unit 31 of the control device 2 and determining a switch between the all seat mode and the driver seat mode.
FIG. 4 is a flowchart for explaining processing performed by the air conditioning control means 32 of the control device 2.
FIG. 5 is a time chart for explaining changes in the required air conditioning heat quantity Qr and the load heat quantity QL.

  In the vehicle air conditioner 1 according to the embodiment, the air conditioning in the passenger compartment 90 is performed in the all seat mode unless the predetermined condition for switching to the driver seat mode is satisfied. 31 determines to switch to the driver seat mode when the predetermined condition is satisfied, and returns to the all seat mode from the driver seat mode when the predetermined condition is not satisfied after switching to the driver seat mode. decide.

First, in step S <b> 101, the air conditioning mode determination unit 31 confirms whether or not an occupant is seated only in the driver seat DS based on the output signal of the seating sensor 51.
When an occupant is seated in a seat other than the driver seat DS (step S101, No), the process of step S101 is repeatedly executed until the occupant is seated only in the driver seat DS. This is because air conditioning in the driver's seat mode is performed on the assumption that a passenger is seated only in the driver's seat DS.

  When an occupant is seated only in the driver's seat DS (step S101, Yes), in step S102, the air conditioning mode determination unit 31 checks whether the temperature in the passenger compartment 90 is stable.

  Specifically, the air-conditioning mode determining means 31 has a difference ΔT (absolute value) between the temperature Tc around the driver seat DS detected by the temperature sensor 52 and the current air-conditioning set temperature Tset less than a predetermined threshold temperature T_th. Whether the calculated difference ΔT is less than the threshold value (ΔT <T_th) is determined to be stable, and when the calculated difference ΔT is not less than the threshold value (ΔT ≧ T_th) Is determined to be unstable.

In general, immediately after the air conditioning in the passenger compartment 90 is started, such as immediately after the start of the vehicle air conditioner 1, the temperature Tc in the passenger compartment 90 and the set temperature Tset of the air conditioning are generally separated. In this case, the all-seat mode in which the temperature inside the passenger compartment 90 can be brought close to the set temperature Tset is given priority over the driver seat mode.
Further, the amount of heat QL in the space excluding the driver seat DS calculated during the driver seat mode cannot be accurately calculated unless the temperature Tc in the passenger compartment 90 is stable (stable period).

  Therefore, when the temperature in the passenger compartment 90 is not stable (No in step S102), the processes in steps S101 and S102 are repeatedly executed until the temperature Tc in the passenger compartment 90 becomes stable. It has become.

  When the temperature Tc in the passenger compartment 90 is stable (step S102, Yo), the air conditioning mode determination means 31 determines to switch the air conditioning mode in the passenger compartment 90 to the driver seat mode. As a result, the air conditioning control means 32 determines the target temperature and target air volume of the conditioned air for only the space around the driver seat DS in the passenger compartment 90, and the air conditioning adjusted by the vehicle air conditioner 1 Air is supplied only to the space around the driver seat DS.

In subsequent step S104, the air conditioning mode determining means 31 confirms whether or not an occupant is seated only in the driver seat DS based on the output signal of the seating sensor 51.
When the passenger is seated only in the driver seat DS (step S104, Yes), the processes in steps S103 and S104 are repeatedly performed, and other seats (passenger seat PS) excluding the driver seat DS. The driver's seat mode is continued as the air conditioning mode in the passenger compartment 90 until the occupant is seated on the rear seat RS).

  If seating of an occupant in a seat other than the driver seat DS is detected (No in step S104), the air conditioning mode determining means 31 changes the air conditioning mode in the passenger compartment 90 from the driver seat mode in step S105. Return to all seat mode. This is because air conditioning in the driver's seat mode is performed on the premise that an occupant is seated only in the driver's seat DS.

  Thereby, until the predetermined condition for switching to the driver seat mode is satisfied again thereafter, the air conditioning control means 32 targets all seats in the passenger compartment 90 for air conditioning and targets the target temperature and target air volume of the conditioned air. The conditioned air adjusted by the vehicle air conditioner 1 is supplied toward all seats in the vehicle interior.

  Subsequently, with reference to FIG. 4 and FIG. 5, the processing performed by the air conditioning control means 32 is (1) before switching to the driver seat mode, (2) during the driver seat mode, and (3) the driver seat. The explanation will be divided into immediately after returning from the mode to the all-seat mode.

(1) Before switching to the driver seat mode Before the driver seat mode is implemented, the air conditioning in the passenger compartment 90 is performed in the all seat mode. Therefore, the process of step S201 is denied, and in step S202, the correction amount determination unit 35 confirms whether or not the necessary air conditioning heat amount Qr needs to be corrected.

  Specifically, the correction amount determination unit 35 checks whether or not the total load heat amount QL_all stored in the storage unit 40 is larger than 0 (zero). , It is determined that correction is necessary, and when it is 0 (zero), it is determined that correction is not necessary.

When the driver's seat mode has never been implemented, the total load heat amount QL_all stored in the storage unit 40 is 0 (zero), and thus the correction amount determination unit 35 determines that no correction is necessary. (Step S202).
As a result, the process proceeds to step S203, and the required heat amount calculation unit 33 calculates the necessary air conditioning heat amount Qr necessary for air conditioning in the all-seat mode, and determines the calculated required air conditioning heat amount Qr as the target air conditioning heat amount. It will be.

Here, immediately after the start of air conditioning in the passenger compartment 90, such as immediately after the start of the vehicle air conditioner 1, the temperature Tc detected by the temperature sensor 52 and the setting are set immediately before the time t0 in FIG. Generally, the difference from the temperature Tset is large and the temperature in the passenger compartment 90 is not stable.
Therefore, in the process of step S203 in this case, the amount of heat required to stabilize the temperature in the vehicle interior at the set temperature Tset (necessary stable heat amount Qs) and the temperature required to change the temperature in the vehicle interior to the set temperature Tset. The total amount of heat (necessary change heat amount Qv) is the required air conditioning heat amount Qr.

  If the difference ΔT between the temperature of the passenger compartment 90 and the set temperature Tset becomes less than the threshold temperature T_th, it is not necessary to change the temperature in the passenger compartment 90 in this case, so the temperature in the passenger compartment is set to the set temperature Tset. The amount of heat necessary for stabilization in step (necessary stable heat amount Qs) becomes the necessary air conditioning heat amount Qr (target air conditioning heat amount) (after time t0 in FIG. 5).

  In subsequent step S204, the air-conditioning condition determination unit 36 determines the target value (target temperature, target air volume) of the air-conditioning air to be supplied into the passenger compartment 90 based on the target air-conditioning heat quantity, and the air-conditioning control. The unit 37 controls the mix door drive motor 55 and the blower 11 so as to achieve the determined target temperature and target air volume.

(2) During the execution of the driver's seat mode When the air conditioning in the passenger compartment 90 is stabilized while the passenger is seated only in the driver's seat DS, the air conditioning mode determination means 31 changes the air conditioning mode in the passenger compartment from the all seat mode. Switch to the driver's seat mode.

If it does so, the process of step S201 will be affirmed and the load heat amount calculation part 34 will calculate the load heat amount QL in step S205.
Since only the driver's seat is subject to air conditioning in the driver's seat mode, the required air conditioning heat amount Qr calculated in the driver's seat mode is an amount of heat that can maintain the temperature of the space around the driver's seat DS at the set temperature, The amount of heat is less than the amount of heat that can hold all seats in the passenger compartment 90 at the set temperature.
For example, in the case of FIG. 5, after the time t1 when the mode is switched to the driver's seat mode, the necessary stable heat amount Qs is smaller than the necessary stable heat amount Qs in the case of all seat air conditioning by the height indicated by the hatching in the figure. .

Therefore, the temperature of the space excluding the driver's seat in the passenger compartment 90 changes under the influence of factors (temperature outside the passenger compartment and the amount of solar radiation) acting from the surrounding environment during the driver's seat mode.
Therefore, the load heat amount calculation unit 34 acts on a space that is not subject to air conditioning in the driver's seat mode, and calculates the heat amount (load heat amount QL) that changes the temperature of the space that is not subject to the following equation (1). ).

QL = (A × (Tamb−Tset) / t) + B × Qsun + C (1)
Here, A, B, and C are coefficients set in advance, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

  In subsequent step S206, the load heat quantity calculation unit 34 stores the calculated load heat quantity QL in the storage area 40a of the load heat quantity QL set in the storage unit 40.

  In step S203, the required heat amount calculation unit 33 calculates the necessary air conditioning heat amount Qr necessary for air conditioning in the driver's seat mode, determines the calculated required air conditioning heat amount Qr as the target air conditioning heat amount, and then performs air conditioning in step S204. The condition determining unit 36 determines the temperature of the conditioned air supplied to the passenger compartment and the target value of the air volume (target temperature, target air volume) based on the target air conditioning heat amount, and the air conditioning control unit 37 determines the determined target temperature and The mix door drive motor 55 and the blower 11 are controlled so as to achieve the target air volume.

  Here, since the calculation of the load heat quantity QL is repeatedly performed while in the driver's seat mode, the integrated value of the load heat quantity QL (total load heat quantity QL_all) stored in the storage area 40a of the storage unit 40 is the driver seat mode. Increases as the continuation time increases (see FIG. 5: Load heat amount integration period).

(3) Immediately after returning from the driver seat mode to the all seat mode When air conditioning in the passenger compartment 90 is performed in the driver seat mode, if an occupant is seated in another seat, the air conditioning mode determining means 31 However, the air conditioning mode in the passenger compartment 90 is returned from the driver seat mode to the all seat mode.

If it does so, the process of step S201 will be denied and the correction amount determination part 35 will confirm the necessity of correction | amendment of the required air-conditioning calorie | heat amount Qr in step S202.
Here, at the time of returning from the driver seat mode to the all seat mode, the integrated value (total load heat amount QL_all) of the load heat amount QL calculated during the driver seat mode is a value larger than 0 (zero). .

  Therefore, it is determined in step S202 that correction is necessary (step S202, Yes), and in step S207, the correction amount determination unit 35 calculates the correction amount D of the required air conditioning heat amount Qr from the following equation (2).

D = E × (Tamb−Tset) + F × Qsun + G (2)
Here, E, F, and G are preset coefficients, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

Subsequently, in step S208, the correction amount determination unit 35 sets a value obtained by subtracting the correction amount D calculated in step S207 from the total load heat amount QL_all stored in the storage unit 40 as a new total load heat amount QL_all.
The amount of heat (total load heat amount QL_all) that contributed to the temperature change in the passenger compartment space excluding the driver's seat during the driver's seat mode is canceled by the correction amount D by the subsequent processing in step S209. It is.

In step S209, the required heat amount calculation unit 33 calculates the required air conditioning heat amount Qr required for air conditioning, and adds the correction amount D calculated in step S207 to the calculated required air conditioning heat amount Qr. Determined as target air conditioning heat quantity.
Thereby, in step S204, the air-conditioning condition determination unit 36 determines the target value (target temperature, target air volume) of the air-conditioning air temperature and air volume supplied to the vehicle interior based on the target air-conditioning heat amount, and the air-conditioning control unit 37 The mix door drive motor 55 and the blower 11 are controlled so that the determined target temperature and target air volume are obtained.

The determination of the air conditioning condition based on the value obtained by adding the correction amount D to the necessary air conditioning heat amount Qr is repeatedly executed until the load heat amount QL (total load heat amount QL_all) integrated during the driver's seat mode becomes zero. become.
Then, at the point in time when the amount of heat (total load heat amount QL_all) contributing to the temperature change in the passenger compartment space excluding the driver's seat is canceled during the driver's seat mode, it is determined in step S202 that no correction is necessary. (Step S202, No), and thereafter, the target air conditioning heat amount and the target air conditioning conditions are determined in the normal all-seat mode (Step S201 → Step S202 → Step S203 → Step S204).

  Here, in the case of FIG. 5, from time t2 when returning to the all-seat mode until time t3 when the total load heat quantity QL_all becomes 0 (zero), based on the required air conditioning heat quantity Qr ′ to which the correction quantity D is added. Thus, the target air conditioning condition is determined (see FIG. 5, correction period).

  After returning to the all-seat mode, when the air-conditioning mode is switched back to the driver-seat mode, calculation and integration of the load heat quantity QL, determination of the target air-conditioning heat quantity, and determination of the target air-conditioning conditions are performed during the driver-seat mode ( Step S201 → Step S205 → Step S206 → Step S203 → Step S204) After that, when the air conditioning mode returns from the driver seat mode to the all seat mode, the load heat amount QL (total load heat amount QL_all) accumulated during the driver seat mode is obtained. Until the offset, the air conditioning is performed based on the required air conditioning heat amount Qr ′ to which the correction amount D is added.

In this way, the outside air temperature Tamb and the amount of solar radiation Qsun at that time are taken into account until the amount of heat (total load heat amount QL_all) contributing to the temperature change in the vehicle interior space excluding the driver seat is canceled during the driver seat mode. The correction amount D calculated in this way is added to the required air conditioning heat amount Qr calculated by the required heat amount calculation unit 33, and the necessary air conditioning heat amount Qr necessary for air conditioning is corrected.
Therefore, it is preferable that the air-conditioning response after returning to the all-seat mode is deteriorated due to the effect when the air-conditioning in the passenger compartment 90 is performed in the driver's seat mode, and the air-conditioning in the passenger compartment becomes insufficient. Can be prevented.
In particular, it is based on the amount of heat that contributed to the temperature change in the space excluding the driver's seat and the amount of heat that was applied during the driver's seat mode (total load heat amount QL_all), not the time when air conditioning was performed in the driver's seat mode. By determining the period for adding the correction amount D, it is possible to suppress the influence when the operation is performed more appropriately in the driver seat mode than when the correction amount D is simply added based on the time.
Further, air conditioning of all seats when the air conditioning mode is returned from the driver seat mode to the all seat mode by occupants in the seats other than the driver seat DS can be quickly performed without adding a new temperature sensor.

As described above, in the embodiment,
(1) All-seat mode (first air-conditioning mode) that targets the entire space in the passenger compartment 90 for air-conditioning, and driver-seat mode (second air-conditioner) that targets the space around the driver seat DS in the passenger compartment 90 for air-conditioning Mode) is prepared as an air conditioning mode in the passenger compartment 90,
The control device 2 of the vehicle air conditioner 1 is configured such that the air conditioning in the passenger compartment 90 is switched from the all-seat mode to the driver seat mode when a predetermined condition is established when the occupant is seated only in the driver seat. There,
Air-conditioning mode determining means 31 for determining the air-conditioning mode;
Air conditioning control means 32 for controlling the conditioned air supplied into the passenger compartment 90, and
The air conditioning control means 32
At least the amount of heat required to calculate the amount of heat necessary for air conditioning in the passenger compartment 90 (necessary air conditioning heat amount Qr) based on the temperature Tc of the space around the driver seat DS detected by the temperature sensor 52 and the set temperature Tset of the air conditioning. A calculation unit 33;
An air conditioning control unit 37 that controls the temperature and air volume of the conditioned air supplied from the vehicle air conditioner 1 into the passenger compartment 90 based on the required air conditioning heat quantity Qr;
When the air conditioning mode is switched from the all-seat mode to the driver seat mode, a load heat amount calculation unit 34 that calculates a load heat amount QL in a space not included in the space around the driver seat in the passenger compartment 90;
When the air conditioning mode is switched from the driver seat mode to the all seat mode, the correction amount D of the required air conditioning heat amount Qr calculated by the required heat amount calculation unit 33 is calculated based on the total load heat amount QL_all calculated during the driver seat mode. A correction amount determination unit 35 to perform,
When the required heat amount calculation unit 33 calculates the correction amount D, the air conditioning control unit 37 calculates the temperature of the conditioned air based on the corrected required air conditioning heat amount Qr ′ to which the correction amount D of the required air conditioning heat amount Qr is added. And a configuration to control the air volume,
The load heat quantity QL calculated by the load heat quantity calculation unit 34 acts on the space in the passenger compartment 90 excluding the driver seat DS during the driver's seat mode, and is a heat quantity that contributes to the temperature change of the space. .

With this configuration, when the air-conditioning mode is switched from the driver's seat mode to the all-seat mode, the total heat of the space (the space in the passenger compartment 90 excluding the driver's seat) that was not subject to air-conditioning in the driver's seat mode. Based on the load amount QL_all, a correction amount D of the required air conditioning heat amount Qr calculated by the required heat amount calculation unit 33 is calculated.
Here, the total heat load QL_all of the space that was not subject to air conditioning is the amount of heat that contributed to the temperature change during the driver's seat mode of the space that was not subject to air conditioning. This takes into account the total heat load QL_all that contributed to the temperature change of the space that was not subject to air conditioning.
Therefore, the air conditioning in the passenger compartment 90 after switching from the driver seat mode to the all seat mode is changed to the necessary air conditioning heat amount Qr ′ after correction by adding the correction amount D to the necessary air conditioning heat amount Qr calculated by the necessary heat amount calculation unit 33. Based on this, the interior of the passenger compartment 90 can be air-conditioned more appropriately than when air conditioning is performed without correcting the required amount of heat Qr.

(2) The load calorie was calculated from the following formula.
Load heat quantity = (A × (Tamb−Tset) / t) + B × Qsun + C
Here, A, B, and C are coefficients set in advance, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

In calculating the load heat amount, the difference between the outside air temperature Tamb and the set temperature Tset of the air conditioning and the solar radiation amount Qsun are taken into consideration, so that the space that was not subject to air conditioning in the driver's seat mode is affected. The amount of heat contributing to the temperature change can be calculated more accurately.
Thereby, since the correction amount D added to the required air conditioning heat quantity Qr can be set to an appropriate value, the air conditioning in the passenger compartment 90 after switching from the driver seat mode to the all seat mode can be performed more appropriately. It becomes like this.

(3) The correction amount D is calculated by the necessary heat amount calculation unit 33 in order to offset the heat amount (total heat load amount QL_all) that contributed to the temperature change of the space that was not subject to air conditioning in the driver seat mode. It was set as the structure which is the calorie | heat amount added to calorie | heat amount (heat-required calorie | heat amount Qr).

  With this configuration, even if the temperature Tc detected by the temperature sensor immediately after returning from the driver seat mode to the all seat mode does not reflect the temperature around the other seats except the driver seat, Since the amount of heat acting on the space around the other seats during the mode is taken into account, the interior of the passenger compartment 90 can be air-conditioned more appropriately than when air conditioning is performed without correcting the required amount of space heat Qr.

(4) The correction amount determination unit 35 contributes to the temperature change of the space (the space in the passenger compartment 90 excluding the driver's seat) that is not subject to air conditioning in the driver seat mode (total heat load amount QL_all). ) Is canceled by the determined integrated value of the correction amount D, the correction amount D is calculated each time the required heat amount calculation unit 33 calculates the heat amount (necessary air conditioning heat amount Qr) required for air conditioning in the passenger compartment 90. The configuration was determined.

  With this configuration, the necessary heat amount is calculated until the amount of heat (total heat load amount QL) that acts on the space around the other seats during the driver's seat mode and contributes to the temperature change in the space is offset. Since the amount of heat necessary for air conditioning in the passenger compartment 90 calculated by the unit 33 (necessary air conditioning heat amount Qr) is corrected, the influence when the air conditioning in the passenger compartment 90 is performed in the driver's seat mode is changed to the all seat mode. It is possible to suitably prevent the air conditioning in the passenger compartment from becoming insufficient after returning.

The correction amount D is calculated from the following equation.
Correction amount = E × (Tamb−Tset) + F × Qsun + G (2)
Here, E, F, and G are preset coefficients, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.

With this configuration, the correction amount is calculated by taking into account the difference between the outside air temperature Tamb after returning to the all-seat mode and the set temperature Tset of the air conditioning and the amount of solar radiation Qsun from the surrounding environment after returning to the all-seat mode. The amount of heat acting on the room can be calculated more accurately.
Thereby, since the correction amount D added to the required air conditioning heat quantity Qr can be set to a more appropriate value, the air conditioning in the passenger compartment 90 after switching from the driver seat mode to the all seat mode can be performed more appropriately. become able to.

(5) The air-conditioning mode determination means 31 determines that the difference ΔT between the air-conditioning set temperature Tset and the temperature Tc detected by the temperature sensor 52 is a threshold value during air-conditioning in the all-seat mode when the passenger is seated only in the driver's seat. When the temperature is lower than T_Th, the switching from the all-seat mode to the driver's seat mode is determined.

When the difference ΔT between the set temperature Tset and the temperature Tc detected by the temperature sensor 52 becomes less than the threshold temperature T_th (ΔT <T_th) during air conditioning in the all-seat mode, the temperature of the entire space in the passenger compartment 90 becomes the set temperature Tset. It is held substantially uniformly at the ambient temperature.
In this state, the temperature in the passenger compartment 90 is stable, and the factors affecting the temperature in the passenger compartment 90 are limited to the solar radiation amount Qsun and the outside air temperature Tamb. Is determined, the heat load QL calculated for the space that is not subject to air conditioning during the driver's seat mode becomes more accurate.
Therefore, since the correction by the correction amount D of the required air conditioning heat quantity Qr performed after switching from the driver seat mode to the all seat mode can be performed more accurately, the air conditioning in the passenger compartment 90 after the switch to the all seat mode is further performed. You can do it properly.

In particular, when the temperature in the passenger compartment 90 is stable, the air volume supplied to the passenger compartment 90 is small, so after returning to the all-seat mode, air conditioning is performed without correcting the required space heat quantity Qr. In this case, it takes time to change the temperature of the entire vehicle interior 90 to the set temperature.
By configuring as described above and correcting the required space heat quantity Qr, the temperature of the entire interior of the passenger compartment 90 after returning to the all-seat mode can be quickly changed to the set temperature.

  In the above-described embodiment, the correction amount D to be added to the required space heat amount Qr is exemplified by determining the difference between the outside air temperature Tamb after returning to the all-seat mode and the set temperature Tset of the air conditioning, and the solar radiation amount Qsun. However, the magnitude of the correction amount D is set to be the largest immediately after returning from the driver seat mode to the all seat mode, and thereafter reduced according to the elapsed time after returning to the all seat mode. Also good.

  If comprised in this way, the temperature of the whole inside of the compartment 90 after returning to all seat mode can be rapidly changed to preset temperature.

Here, while the air-conditioning condition determination unit 36 determines the target value (target temperature, target air volume) of the air-conditioning air temperature and air volume supplied to the vehicle interior based on the corrected required space heat quantity Qr ′. The weight of the target air volume may be greater than the target temperature.
With this configuration, the air volume of the conditioned air supplied to the passenger compartment increases, so the air in the passenger compartment is agitated and the overall temperature in the passenger compartment after returning to the all-seat mode can be set in a shorter time. It becomes possible to approach.

In addition, while the air conditioning condition determination unit 36 determines the target value (target temperature, target air volume) of the temperature and air volume of the air-conditioning air to be supplied to the vehicle interior based on the corrected necessary space calorie Qr ′, The weighting of the target temperature may be larger than the target air volume.
If comprised in this way, after returning to all seat mode, since the air volume of air-conditioning air does not suddenly increase, it can prevent suitably that a passenger | crew feels a sudden feeling because the air volume changes suddenly.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Control apparatus 11 Blower 12 Evaporator 13 Heater core 14 Mix door 15 Mixing part 16 Differential side supply port 17 Front side supply port 18 Vent side supply port 19a, 19b Driver's seat side duct 19c, 19d Passenger seat side duct 20 (20a-20d) Door 21 I / O port 22 Bus 30 CPU
DESCRIPTION OF SYMBOLS 31 Air-conditioning mode determination means 32 Air-conditioning control means 33 Required heat amount calculation part 34 Load heat amount calculation part 35 Correction amount determination part 36 Air-conditioning condition determination part 37 Air-conditioning control part 40 Memory | storage part 51 Seating sensor 52 Temperature sensor 53 Outside air temperature sensor 54 Solar radiation amount sensor 55 Mix door drive motor 56 Duct door drive motor 57 Air conditioning setting means 90 Car compartment 91 Steering column cover DS Driver seat PS Passenger seat RS Rear seat T Threshold temperature Tc Temperature Ta Target temperature Tset Set temperature Tamb Outside temperature V Vehicle

Claims (7)

A first air-conditioning mode for air-conditioning the entire space in the vehicle interior and a second air-conditioning mode for air-conditioning a specific space in the vehicle interior are prepared as air-conditioning modes for the vehicle interior,
A vehicle configured to switch the air conditioning mode in the passenger compartment from the first air conditioning mode to the second air conditioning mode when a predetermined condition is satisfied when an occupant is seated only in the specific space. Air conditioner control device,
Air conditioning mode determining means for determining the air conditioning mode;
Air conditioning control means for controlling the conditioned air supplied into the vehicle compartment,
The air conditioning control means includes
A required heat amount calculation unit for calculating a heat amount necessary for air conditioning in the vehicle interior based on at least the temperature of the specific space detected by the temperature sensor and the set temperature of the air conditioning;
An air conditioning control unit for controlling the temperature and the air volume of the conditioned air supplied into the vehicle interior based on the amount of heat;
When the air conditioning mode is switched from the first air conditioning mode to the second air conditioning mode, a load heat amount calculating unit that calculates a load heat amount in a space not included in the specific space in the vehicle interior;
When the air-conditioning mode is switched from the second air-conditioning mode to the first air-conditioning mode, the necessary heat amount calculation unit calculates based on the load heat amount calculated during the second air-conditioning mode. A correction amount determination unit that determines a correction amount of the heat amount,
When the correction amount is determined, the air-conditioning control unit controls the temperature and the air volume of the conditioned air based on the heat amount corrected by the correction amount. .   The load heat amount calculated by the load heat amount calculation unit is a heat amount that acts on a space not included in the specific space in the vehicle interior during the second air conditioning mode and contributes to a temperature change in the space. The vehicle air conditioner control device according to claim 1, wherein the vehicle air conditioner control device is provided. The said load calorie | heat amount is calculated from following formula (1), The control apparatus of the vehicle air conditioner of Claim 2 characterized by the above-mentioned.
Load heat quantity = (A × (Tamb−Tset) / t) + B × Qsun + C (1)
Here, A, B, and C are coefficients set in advance, Tamb is the outside air temperature, Tset is the air conditioning set temperature, and Qsun is the amount of solar radiation.   The correction amount is a heat amount that is added to a heat amount calculated by the necessary heat amount calculation unit in order to cancel out a heat amount that has contributed to a temperature change in a space that is not included in the specific space. The control apparatus of the vehicle air conditioner of Claim 2 or Claim 3. The correction amount determination unit
The necessary heat amount calculation unit calculates the amount of heat necessary for air conditioning in the passenger compartment until the amount of heat that has contributed to the temperature change of the space not included in the specific space is offset by the determined cumulative amount of correction amount. The control device for a vehicle air conditioner according to any one of claims 2 to 4, wherein the correction amount is determined each time.   The correction amount determination unit sets the correction amount to a smaller value as the elapsed time after switching from the second air conditioning mode to the first air conditioning mode becomes longer. Item 6. The control device for a vehicle air conditioner according to Item 5. The air conditioning mode determining means includes
If the difference between the set temperature and the temperature of the specific space is less than a threshold during air conditioning in the first air conditioning mode when an occupant is seated only in the specific space, the first air conditioning mode The control device for a vehicle air conditioner according to any one of claims 1 to 6, wherein switching to the second air conditioning mode is determined.

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